My doctor has strongly advised against play because my elbow injury, that I keep carrying on for months, got worse in the past week. I will do everything in my power to recover and do all the necessary therapy to be able to return on court as soon as possible. Sadly, I won't be able to defend my title in Miami this week. Believe me, it is as shocking to me, as it is to you. I had incredible run in Miami, I won there my first masters tournament and started my campaign towards the top of the world rankings. No wonder they say that in sport the biggest and most painful defeats come from injuries, and not from opponents. I am lucky that throughout my career I didn't have many injuries, but I guess that all that I've been through physically in the past so many years did leave a mark on my body.

Andy Murray announced his withdrawal, also due to an elbow injury, on Saturday. Stan Wawrinka will enter as the top seed at the event.